Performance Evaluation of Multistage Fractured Horizontal Wells in Tight Gas Reservoirs at Block M, Ordos Basin

Li Wu, Jiqun Zhang, Deli Jia, Shuoliang Wang and Yiqun Yan
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Li Wu: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Jiqun Zhang: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Deli Jia: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Shuoliang Wang: School of Energy, China University of Geosciences (Beijing), Beijing 100083, China
Yiqun Yan: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Energies, 2022, vol. 15, issue 2, 1-29

Abstract: Block M of the Ordos Basin is a typical low-permeability tight sandstone gas accumulation. To develop these reservoirs, various horizontal well fracturing technologies, such as hydra-jet fracturing, open-hole packer multistage fracturing, and perf-and-plug multistage fracturing, have been implemented in practice, showing greatly varying performance. In this paper, six fracturing technologies adopted in Block M are reviewed in terms of principle, applicability, advantages, and disadvantages, and their field application effects are compared from the technical and economic perspectives. Furthermore, the main factors affecting the productivity of fractured horizontal wells are determined using the entropy method, the causes for the difference in application effects of the fracturing technologies are analyzed, and a comprehensive productivity impact index (CPII) in good correlation with the single-well production of fractured horizontal wells is constructed. This article provides a simple and applicable method for predicting the performance of multi-frac horizontal wells that takes multiple factors into account. The results can be used to select completion methods and optimize fracturing parameters in similar reservoirs.

Keywords: Ordos Basin; low-permeability tight sandstone gas reservoir; horizontal well; multistage fracturing; comprehensive productivity impact index (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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